Flush-valve.



R. W. 64 A. B. SCHIER.

FLUSH VALVE.

APPLICATION FILED SEPT. 15, 1914.

Patented July 10, 191?.

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RUDOLPH W. SCHIER AND ADOLPH B. SCHIER, OF MILWAUKEE, WISCONSIN.

FLUSH-VALVE.

Specification of Letters Patent.

Patented July MP, 1991?.

Application filed September 15, 1914. Serial No. 861,806.

To all whom it may concern:

Be it known that we, RUDOLPH W. Sonmn and ADoLPH B. SOHIER, citizens of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented new and useful Improvements in Flush-Valves, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

This invention relates to improvements in flush valves.

It has among its objects to provide a flush valve which will be quiet and eficient in operation, durable in service, and capable 0 being readily adjusted for timing purposes.

Various other objects and advantages will appear hereinafter.

The accompanying drawing illustrates one embodiment of the invention which will now be described.

In the accompanying drawing,

Figure 1 is a longitudinal sectional view through the value; and,

Fig. 2 is a detail view thereof.

Briefly described, the valve includes a casing 1 having an inlet port 2 and an outlet port 3, a piston 4 reciprocable within the casing and provided with a valve 5 engaging a seat 6 to close the outlet port 3 and a pushbutton control valve 7 controlling a passage 8-9 from the upper end of the casing to the outlet port 3 below the valve 5. The piston 4 carries a cup washer 10 snugly fitting within the casing and said piston has an axial passageway 11 afi'ording communication between the inlet 2 and the upper end of the casing. Thus, as will be understood, the fluid entering the inlet 2 will flow through the passageway 11 in the iston to the upper end of the casing and w en the control valve 7 is closed the pressure of the fluid in the upper end of the casing will force the piston 4 downwardly to seat the valve 5 and thereby close the outlet port, as shown in Fig. 1. On the other hand, when the valve 7 is opened the fluid in the upper end of the casing is permitted to escape through the passageway 8-9 to the outlet 3, whereby the fluid entering the inlet 2 will lift the piston 4, thus raising the valve 5 from its seat 6 and opening communication between the inlet port 2 and the outlet port 3.

4 regulation.

First, considering in detail the valve 5, the same is provided with a tapered or conical packing 12 while its seat 6 is curved or chamfered. The packing12 is formed of a suitable yielding material, such as rubber, whereby when the same is forced against the seat 6 it will wedge therein to shut off the flow of fluid to the outlet gradually and practically complete the shut-ofl before the valve is finally seated. In other words, the valve construction described provides in effect a plurality of progressively seating valves each seating tighter than the preceding one until the flow of fluid to the outlet is entirely shut off: In consequence, the valve will operate very quietly without pounding, and furthermore, will effect a positive shutoff of the fluid.

The piston 4 is formed in three sections a, b and 0. The section (1 works within the outlet port 3 to form a guide for the piston and threads onto an extension 13 of the section I) to clamp the valve packing 12 in position on the piston. The section b in turn threads onto an extension 14 of the section 0 to clamp the cup washer 10 in position on said piston. The section 0 also forms a guide for the piston, being provided to this end with annular flanges 15 and 16. The passageway 11 extends entirely through the section 3 of the piston and into the section b, said latter section having openings 17 therein affording communication between passageway 11 and to this end the valve illustrated is provided with a pin 18 arranged within said passageway. This pin, however, difiers in material respects from those heretofore employed and has important advantages. First, it is screw-threaded and of such diameter as to snugly fit the passageway although having suiflcient clearance to permit the piston to slide freely thereon. In consequence, the fluid passing to the upper part of the casing is restricted in volume to the size of the thread of the pin and is forced to take a spiral path whereby its flow is materially retarded. Thus the desired results may readily be secured without the nicety of proportions of the pin and passageway heretofore necessary for volume Also, the threading of the pin permits of an'increase in the diameter of said pin and by forcing the fluid to take a spiral path surrounds said pin with a film of fluid which minimizes the wear on the pin and walls of the passageway. A second important feature of the pin is that it 1s unsecured to any fixed part whereby it is free to aline with the passageway in the piston upon any variation in the line of travel of said piston. As illustrated, the pin carries a disk 19 clamped between two nuts 20 and is surrounded between said disk and the piston 4 with an expansion spring 21. Thus the spring resiliently supports the pin while the cover of the caslng has a recess 22 to loosely receive'the tapered end 23 of said pin whereby said pin is normally held in an approximately centered position and is always free to aline with the piston as aforesaid. In practice, the spring 21 may be omitted and the pin left floating but the spring is very desirable in that it assists in the seating of the valve 5, thereby tending to render the valve more positive in its act on. Still another advantageous feature of the pin 18 is that it the range of travel g thereof. As will be apparent, the nuts 20 on the pin provide a stop for the piston and hence by adjusting said nuts longitudinally of the pin the travel of the piston may be varied accordingly.

- e the same includes a casing 25 having reciprocable therein a hollow piston 26 open at its lower end to communicate with the passage 9 and provided with side openings 27 to afford communication with the passage 8. Be' low the openings 27 the piston carries a valve 28 to engage a seat 29 and thereby shut off communicatlon between the passage 8 from the main valve casing and the openings 27 in the piston 26. Also, the piston 26 car-, ries at its lower end a cup washer 30 snugly fitting the lower end of the casing 25 to shut ofl direct communication between the pas sages 8 and 9 and to govern the action of the control valve as hereinafter set forth. The control valve is, of course, designed to be normally closed and to this end spring 31 is arranged to lift said piston and thereby forcibly seat the va ever, as will be retard I the cup washer 30 is vantageous in this connection. As apparent, this washer is subject to the g 25 dash-pot eflect independent of the fluid pressure, thereby'insuring reclosure of the control valve in a gradual manner.

From the foregoing it will also be observed that the valve as a whole has additional dist1nct and lmportant advantages including very a Will be provides for adjustment of erring now to the push-button valve 7 an expansion the simplicity and compactness of its-construction and the accessibility of its parts. The parts may be readily assembled in the casing and removed therefrom for inspection, etc. Further, to facilitate the removal of the piston 4 which snugly fits within the casing, the same is provided with an up wardly extending lug 32 recessed to be readily gripped by hand or by a suitable instrument.

What we claim as new and desire to secure by Letters Patent is:

1. In a flush valve, in combination, a casing having an inlet port and an outlet port, .a valve controlling one of said ports, a piston controlling said valve and having a passageway therein leading from said inlet to a chamber in said casing at the end of said piston and a pin fitting freely within said passageway, said pin acting to restrict the flow of fluid through said passageway and being provided with an irregular surface to increase the frictional resistanceto such flow of fluid.

2. In a flush valve, in combination, a casing. having an inlet port and .an outlet port,

a valve controlling one of said ports, ton controlling said valve and having therein a passageway leading from the inlet to a chamber in said casing at the end of said piston, a pin fitting freely within said passageway to permit reciprocation of said piston relatively thereto, said pin acting to restrict the flow of fluid through said passageway and being spirally threaded to increase the frictional resistance to such flow of fluid and to effect uniform distribution of fluid about the same.

3. In a flush valve, in combination, a casing having an inlet port and an outlet port, a valve controlling ton controlling said valve, said piston having therein a passageway leading from the inlet to a chamber in the casing at the end of said piston, a relatively stationary pin loose within said casing and loosely fitting within said passageway in said piston and a spring interposed between a part on said pin and said piston for the purpose set forth.

4. In a flush valve, in combination, a casing having an inlet port and an outlet port, a valve controlllng one of said ports, a piston controlling said valve, said piston having therein a passageway leading from the inlet to a chamber in the casing at the end of said piston, a pin loosely fitting within said passageway in said piston and a member ad justably mounted on said pin to limit the movement of said piston.

5. In a flush valve, in combination, a casing having an inlet port and an outlet port, a valve controlling one of said ports, a piston controlling said valve, said piston having therein a passageway leading from the inlet to a chamber in the casing at the end of said a pisasaeaa piston, a pin loose within said casing and loosely fitting into said passageway in said piston, a member adjustably mounted on said pin to limit the movement of said piston and a spring interposed between said piston and a part on said pin for the purpose set forth.

6. In a flush valve, in combination, a casing having an inlet port and an outlet port, a valve controlling one of said ports, a piston controlling said valve, said piston having therein a passageway leading to a chamber in the casing at the end of said piston, and a pin loosely .fitting within said passageway to permit reciprocation of said piston relative thereto, said pin being spirally threaded throughout the length thereof traversed by said piston.

7 In a flush valve, in combination, a we ing having an inlet port and an outlet port, a. valve controlling one of said ports, a piston controlling said valve, said piston having therein a passageway leading from the inlet to a chamber in the casing at the end of said piston, a pin loosely fitting within said passageway in said piston, said pin being loose within said casing and said casing havbore of said piston whereby its groove provides a constantly open but restricted and spiral passage from the inlet to said chamber at the end of said piston and a stop for said piston threaded onto said pin whereby said stop may be adjusted to vary the limit of travel of said piston.

In witness whereof, we have hereunto subscribed our names in the presence of two witnesses.

RUDOLPH W. SCI-HER. ADOLPH B. SCI-HER.

Witnesses:

TEKLA BAsT, L. A. WATSON. 

